Microsoft announced Monday two new agreements to purchase wind energy, bringing the company’s total investment in wind energy projects in the U.S. to more than 500 megawatts, according to an announcement.

Meanwhile, Amazon Web Services announced Amazon Wind Farm US Central 2, a new 189 megawatt wind farm in Hardin County, Ohio, at the end of October. AWS’ new farm will generate 530,000 megawatt hours of wind energy annually starting in December 2017.

The two initiatives demonstrate cloud providers’ growing need for sustainable sources of energy for their power-hungry data centers.